Wow, that's impressive. I still haven't solved that one yet, but at least I know it's solvable now. (I was about to change the 0 barrels pushing out the random barrels to a dozer, but I guess I'll leave it this way now.)

Very nice. I thought it might be possible to do something along those lines, but I haven't been able to work it out myself yet. (I've been kinda busy lately. I probably won't be able to get back to this for a few weeks. )

Since I finally solved Matching Problem 3, I made a new one. Here's Matching Problem 4: BUCYHIN Warning: It's likely even harder. I haven't solved it yet.

Edit: Err... I have no idea how to solve this at the moment. I'm not sure if there's enough room overall or enough room around the gates, combined with the fact that it's not straight-forward knowing when to get everything started.

Mmmm, you could have left a little bit more space to the right side of the matchers. I played around with various potential solutions, but they all needed 2-3 spaces more on the right side. In the end, I found one that didn't:

Also this solution would have been helped with a couple of spaces more on the right. About half the equipment is there to compensate for that lack of space.You have plenty of time to figure out how it works, a full run takes about 20 minutes.